Note1: Quad Channel: V = supports 2 modules and 4 modules Note2: The O.C. mode is not guaranteed. It depends on whole system configuration and other parameters. Note3: For system stability, use more efficient memory cooling system to support a full memory load (4 DIMMs) when overclocking. Note4:Due to the configuration of CPU, the default speeds of DDR3 2333/2300/2200/2000/1800 MHz will operate at DDR3 2133/2133/2133/1866/1600 MHz.